<?php
/** ImmutableAttributeError: access to an Immutable attribute
 *  Thrown from within an object of Yz_Class, so rely on the object's presence in trace
 *
 */
class ImmutableAttributeError
    extends AttributeError
{
    const ERROR_MESSAGE = 'Immutable attribute "%{attr}" in %{object}'; // requires object Yz_Class
} // class

